Finding the Fourth Proportional to 1,276,686,888.66, 1,915,583,363.76 and 685,787,641.62
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Solution
The fourth proportional to 1,276,686,888.66, 1,915,583,363.76 and 685,787,641.62 is: 1,028,978,529.53
Step by Step Solution
- Step 1: Write the proportion equation
1,276,686,888.66 : 1,915,583,363.76 = 685,787,641.62 : x - Step 2: Convert to fraction form
1,276,686,888.66/1,915,583,363.76 = 685,787,641.62/x - Step 3: Cross multiply
1,276,686,888.66x = 1,915,583,363.76 × 685,787,641.62 - Step 4: Simplify right side
1,276,686,888.66x = 1,313,683,397,359,476,992 - Step 5: Solve for x
x = 1,313,683,397,359,476,992/1,276,686,888.66 - Step 6: Final answer
x = 1,028,978,529.53
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.